Pensions and Other Postretirement Benefits (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Pensions | ||||
| Components of net annual benefit cost (income): | ||||
| Service cost | $ 0.3 | $ 0.3 | $ 0.6 | $ 0.7 |
| Interest cost | 10.7 | 11.9 | 21.4 | 23.9 |
| Expected return on plan assets | (11.3) | (11.9) | (22.6) | (24.1) |
| Amortization of net actuarial and other (gain) loss | 3.5 | 3.4 | 7.0 | 6.9 |
| Recognized (gain) loss due to curtailments, settlements, and other | 0.4 | 0.1 | 1.2 | 0.2 |
| Net periodic benefit cost (income) | 3.6 | 3.8 | 7.6 | 7.6 |
| Other Benefits | ||||
| Components of net annual benefit cost (income): | ||||
| Service cost | 0.0 | 0.0 | 0.0 | 0.0 |
| Interest cost | 0.0 | 0.1 | 0.1 | 0.2 |
| Expected return on plan assets | 0.0 | 0.0 | 0.0 | 0.0 |
| Amortization of net actuarial and other (gain) loss | (0.1) | (0.2) | (0.5) | (0.5) |
| Recognized (gain) loss due to curtailments, settlements, and other | 0.0 | 0.0 | 0.0 | 0.0 |
| Net periodic benefit cost (income) | $ (0.1) | $ (0.1) | $ (0.4) | $ (0.3) |
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of cost recognized for passage of time related to defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Amount of gain (loss) recognized in net periodic benefit (cost) credit from settlement and curtailment. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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